2015 Chevrolet Silverado 3500 fuel/propulsion system problems
11 owner complaints filed with NHTSA name the fuel/propulsion system on the 2015 Chevrolet Silverado 3500 — 21% of all complaints for this model year.
What owners report
“I own a 2015 Chevrolet Silverado 3500HD Duramax diesel. At approximately 130,000 miles, the high-pressure CP4 fuel pump failed internally, sending metal shavings throughout the fuel system and contaminating major components. The truck suddenly lost power on the freeway and became inoperable without…”
filed Jul 19, 2026
“Truck was operating on the highway at highway speed. Suddenly the truck went into a drastic engine power reduction mode and severe automatic downshifting occurred; the truck came to a complete stop on the highway. Diagnostics proved to be a CP4 injector pump failure sending metal into the fuel…”
filed Jul 17, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Silverado 3500 years
| Year | Reports | Share |
|---|---|---|
| 2024 Silverado 3500 | 2 | 4% |
| 2021 Silverado 3500 | 4 | 11% |
| 2020 Silverado 3500 | 4 | 10% |
| 2019 Silverado 3500 | 3 | 14% |
| 2016 Silverado 3500 | 11 | 22% |
| 2013 Silverado 3500 | 3 | 12% |
| 2012 Silverado 3500 | 4 | 17% |
| 2011 Silverado 3500 | 4 | 14% |
| 2008 Silverado 3500 | 1 | 3% |
| 2007 Silverado 3500 | 1 | 3% |
| 2006 Silverado 3500 | 2 | 4% |
| 2005 Silverado 3500 | 1 | 2% |
Other reported problem areas on the 2015 Chevrolet Silverado 3500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.